Chart 9
WARNING: This page does not describe the selected car, but rather 28 other vehicles, including the 2014 Lincoln Navigator, 2014 Lincoln MKZ, 2014 Lincoln MKX, 2014 Lincoln MKT, and 2014 Lincoln MKS. However, it is still accessible from the selected car via links, so may be relevant.
- Spark Knock
NOTE:
Carbon build up in the combustion chamber and on the back of valves can be a contributing factor for engine spark knock concerns. Remove carbon deposits prior to any component replacements.
| SYSTEM/COMPONENT | REFERENCE (Section 5 Pinpoint Test unless noted) |
|---|---|
| Cooling System | Verify the engine operates at normal temperature. REFER to the appropriate service information article, Engine Cooling, The Engine Overheats or No Diagnostic Trouble Codes (DTCs) Present Symptom Chart Index to diagnose any cooling system concerns that are present. Verify correct coolant level and coolant concentration. REFER to the appropriate service information article, Engine Cooling, Cooling System Draining, Filling and Bleeding for correct coolant concentrations and fill procedures. |
| Mass Airflow (MAF) Sensor | GO to PINPOINT TEST DC: MASS AIRFLOW (MAF) SENSOR . |
| Base Engine | REFER to the appropriate service information article, Engine System and CARRY OUT the Inspection and Verification to continue diagnosis. |
| Fuel Delivery System | GO to PINPOINT TEST HC: FUEL DELIVERY SYSTEM . |
| Secondary Ignition System | For Fiesta 1.6L TIVCT, GO to PINPOINT TEST JC: SECONDARY IGNITION (COIL PACK)
. For all others, GO to PINPOINT TEST JB: SECONDARY IGNITION (COP) . |
| Positive Crankcase Ventilation (PCV) System | GO to PINPOINT TEST HG: POSITIVE CRANKCASE VENTILATION (PCV) SYSTEM . |
| Engine Oil Quality | Visual. |
| Additional Testing | GO to PINPOINT TEST Z: INTERMITTENT . |